<!--
/**
 * author: vformAdmin
 * email: vdpadmin@163.com
 * website: https://www.vform666.com
 * date: 2021.08.18
 * remark: 如果要分发VForm源码，需在本文件顶部保留此文件头信息！！
 */
-->

<template>
  <el-container class="main-container full-height">
    <!--    <el-header class="main-header">-->
    <!--      <div class="float-left main-title">-->
    <!--        <img src="../../assets/vform-logo.png" @click="openHome">-->
    <!--        <span class="bold">VForm</span> {{i18nt('application.productTitle')}} <span class="version-span">Ver {{vFormVersion}}</span></div>-->
    <!--      <div class="float-right external-link">-->
    <!--        <el-dropdown v-if="showLink('languageMenu')" @command="handleLanguageChanged">-->
    <!--          <span class="el-dropdown-link">{{curLangName}}<i class="el-icon-arrow-down el-icon&#45;&#45;right"></i></span>-->
    <!--          <el-dropdown-menu slot="dropdown">-->
    <!--            <el-dropdown-item command="zh-CN">{{i18nt('application.zh-CN')}}</el-dropdown-item>-->
    <!--            <el-dropdown-item command="en-US">{{i18nt('application.en-US')}}</el-dropdown-item>-->
    <!--          </el-dropdown-menu>-->
    <!--        </el-dropdown>-->
    <!--        <a v-if="showLink('externalLink')" href="javascript:void(0)" @click="(ev) => openUrl(ev, gitUrl)" target="_blank"><svg-icon icon-class="github" />{{i18nt('application.github')}}</a>-->
    <!--        <a v-if="showLink('externalLink')" href="javascript:void(0)" @click="(ev) => openUrl(ev, docUrl)" target="_blank"><svg-icon icon-class="document" />{{i18nt('application.document')}}</a>-->
    <!--        <a v-if="showLink('externalLink')" href="javascript:void(0)" @click="(ev) => openUrl(ev, chatUrl)" target="_blank">{{i18nt('application.qqGroup')}}</a>-->
    <!--        <a v-if="showLink('externalLink')" href="javascript:void(0)" @click="(ev) => openUrl(ev, subScribeUrl)" target="_blank">-->
    <!--          {{i18nt('application.subscription')}}<i class="el-icon-top-right"></i></a>-->
    <!--      </div>-->
    <!--    </el-header>-->

    <el-container>
      <el-aside class="side-panel">
        <widget-panel :designer="designer"/>
      </el-aside>

      <el-container class="center-layout-container">
        <el-header class="toolbar-header">
          <toolbar-panel :designer="designer" ref="toolbarRef">
            <template v-for="(idx, slotName) in $slots" #[slotName]>
              <slot :name="slotName"></slot>
            </template>
          </toolbar-panel>
        </el-header>
        <el-main class="form-widget-main">
          <el-scrollbar class="container-scroll-bar" :style="{height: scrollerHeight}">
            <v-form-widget :designer="designer" :form-config="designer.formConfig" :form-data="value">
            </v-form-widget>
          </el-scrollbar>
        </el-main>
      </el-container>

      <el-aside>
        <setting-panel :designer="designer" :selected-widget="designer.selectedWidget"
                       :form-config="designer.formConfig"/>
      </el-aside>
    </el-container>

  </el-container>
</template>

<script>
import WidgetPanel from './widget-panel'
import ToolbarPanel from './toolbar-panel'
import SettingPanel from './setting-panel'
import VFormWidget from './form-widget'
import {createDesigner} from "@/components/v-form-design/form-designer/designer"
import {
  addWindowResizeHandler,
  deepClone,
  getAllContainerWidgets,
  getAllFieldWidgets,
  getQueryParam,
} from "@/components/v-form-design/utils/util"
import {MOCK_CASE_URL, VARIANT_FORM_VERSION} from "@/components/v-form-design/utils/config"
import i18n, {changeLocale} from "@/components/v-form-design/utils/i18n"
import axios from "axios"

export default {
  name: "VFormDesigner",
  componentName: "VFormDesigner",
  mixins: [i18n],
  components: {
    WidgetPanel,
    ToolbarPanel,
    SettingPanel,
    VFormWidget,
  },
  props: {
    /* 后端字段列表API */
    fieldListApi: {
      type: Object,
      default: null,
    },

    /* 禁止显示的组件名称数组 */
    bannedWidgets: {
      type: Array,
      default: () => []
    },

    input: Function,

    // 值
    value: {
      type: Object,
      required: false
    },

    // 禁用
    disabled: {
      type: [Boolean],
      required: false,
      default: false
    },
    // 只读
    readonly: {
      type: [Boolean],
      required: false,
      default: false
    },

    designerConfig: {
      type: Object,
      default: () => {
        return {
          languageMenu: true,  //是否显示语言切换菜单
          externalLink: true,  //是否显示GitHub、文档等外部链接
          formTemplates: true,  //是否显示表单模板
          eventCollapse: true,  //是否显示组件事件属性折叠面板
          widgetNameReadonly: false,  //禁止修改组件名称

          clearDesignerButton: true,  //是否显示清空设计器按钮
          previewFormButton: true,  //是否显示预览表单按钮
          importJsonButton: true,  //是否显示导入JSON按钮
          exportJsonButton: true,  //是否显示导出JSON器按钮
          exportCodeButton: true,  //是否显示导出代码按钮
          generateSFCButton: true,  //是否显示生成SFC按钮
          toolbarMaxWidth: 420,  //设计器工具按钮栏最大宽度（单位像素）
          toolbarMinWidth: 300,  //设计器工具按钮栏最小宽度（单位像素）

          presetCssCode: '',  //设计器预设CSS样式代码

          resetFormJson: false,  //是否在设计器初始化时将表单内容重置为空
        }
      }
    },

  },
  data() {
    return {
      vFormVersion: VARIANT_FORM_VERSION,
      curLangName: '',

      vsCodeFlag: false,
      caseName: '',

      docUrl: 'https://www.vform666.com/document.html',
      gitUrl: 'https://github.com/vform666/variant-form',
      chatUrl: 'https://www.vform666.com/chat-group.html',
      subScribeUrl: 'https://www.vform666.com/subscribe.html',

      scrollerHeight: 0,

      designer: createDesigner(this),

      fieldList: []
    }
  },
  watch: {
    value(value) {
      // 父组件收到input事件后会通过v-model改变value参数的值
      // 然后此处会watch到value的改变，发出change事件
      // change事件放在此处发射的好处是，当外部修改value值时，也能够触发form-data-change事件
      this.$emit('change', value)
      // console.log(value, {formConfig: this.designer.formConfig, widgetList: this.designer.widgetList})
      // // if(isEqual(value, {formConfig: this.designer.formConfig, widgetList: this.designer.widgetList}))
      // //   return
      // // // 如果值是被外部改变的，则修改本组件的currentValue
      // console.log(value, {formConfig: this.designer.formConfig, widgetList: this.designer.widgetList})
      // this.setFormJson(value)
    },
    'designer.widgetList': {
      deep: true,
      handler(val) {
        this.$emit('input', {formConfig: deepClone(this.designer.formConfig), widgetList: val}, {widgetList: val})
      }
    },

    'designer.formConfig': {
      deep: true,
      handler(val) {
        this.$emit('input', {formConfig: val, widgetList: deepClone(this.designer.widgetList)}, {formConfig: val})
      }
    },

  },
  provide() {
    return {
      serverFieldList: this.fieldList,
      getDesignerConfig: () => this.designerConfig,
      getBannedWidgets: () => this.bannedWidgets,
    }
  },
  created() {
    this.vsCodeFlag = getQueryParam('vscode') == 1
    this.caseName = getQueryParam('case')
    // console.log(this.value, 'inner')
    // this.setFormJson(this.value)
  },
  mounted() {
    this.initLocale()

    this.scrollerHeight = window.innerHeight - 56 - 36 + 'px'
    addWindowResizeHandler(() => {
      this.$nextTick(() => {
        this.scrollerHeight = window.innerHeight - 56 - 36 + 'px'
      })
    })

    this.loadCase()

    this.loadFieldListFromServer()
  },
  methods: {
    showLink(configName) {
      if (this.designerConfig[configName] === undefined) {
        return true
      }

      return !!this.designerConfig[configName]
    },

    openHome() {
      if (!!this.vsCodeFlag) {
        const msgObj = {
          cmd: 'openUrl',
          data: {
            url: 'https://www.vform666.com/'
          }
        }
        window.parent.postMessage(msgObj, '*')
      }
    },

    openUrl(event, url) {
      if (!!this.vsCodeFlag) {
        const msgObj = {
          cmd: 'openUrl',
          data: {
            url
          }
        }
        window.parent.postMessage(msgObj, '*')
      } else {
        let aDom = event.currentTarget
        aDom.href = url
        //window.open(url, '_blank') //直接打开新窗口，会被浏览器拦截
      }
    },

    loadCase() {
      if (!this.caseName) {
        return
      }

      axios.get(MOCK_CASE_URL + this.caseName + '.txt').then(res => {
        if (!!res.data.code) {
          this.$message.error(this.i18nt('designer.hint.sampleLoadedFail'))
          return
        }

        this.setFormJson(res.data)
        this.$message.success(this.i18nt('designer.hint.sampleLoadedSuccess'))
      }).catch(error => {
        this.$message.error(this.i18nt('designer.hint.sampleLoadedFail') + ':' + error)
      })
    },

    initLocale() {
      let curLocale = localStorage.getItem('v_form_locale')
      if (!!this.vsCodeFlag) {
        curLocale = curLocale || 'en-US'
      } else {
        curLocale = curLocale || 'zh-CN'
      }
      this.curLangName = this.i18nt('application.' + curLocale)
      this.changeLanguage(curLocale)
    },

    loadFieldListFromServer() {
      if (!this.fieldListApi) {
        return
      }

      let headers = this.fieldListApi.headers || {}
      axios.get(this.fieldListApi.URL, {'headers': headers}).then(res => {
        let labelKey = this.fieldListApi.labelKey || 'label'
        let nameKey = this.fieldListApi.nameKey || 'name'

        this.fieldList.splice(0, this.fieldList.length)  //清空已有
        res.data.forEach(fieldItem => {
          this.fieldList.push({
            label: fieldItem[labelKey],
            name: fieldItem[nameKey]
          })
        })
      }).catch(error => {
        this.$message.error(error)
      })
    },

    handleLanguageChanged(command) {
      this.changeLanguage(command)
      this.curLangName = this.i18nt('application.' + command)
    },

    changeLanguage(langName) {
      changeLocale(langName)
    },

    setFormJson(formJson) {
      let modifiedFlag = false
      if (!!formJson) {
        if (typeof formJson === 'string') {
          modifiedFlag = this.designer.loadFormJson(JSON.parse(formJson))
        } else if (formJson.constructor === Object) {
          modifiedFlag = this.designer.loadFormJson(formJson)
        }

        if (modifiedFlag) {
          this.designer.emitHistoryChange()
        }
      }
    },

    getFormJson() {
      return {
        widgetList: deepClone(this.designer.widgetList),
        formConfig: deepClone(this.designer.formConfig)
      }
    },

    clearDesigner() {
      this.$refs.toolbarRef.clearFormWidget()
    },


    /**
     * 刷新表单设计器
     */
    refreshDesigner() {
      //this.designer.loadFormJson( this.getFormJson() )  //只有第一次调用生效？？

      let fJson = this.getFormJson()
      this.designer.clearDesigner(true)  //不触发历史记录变更
      this.designer.loadFormJson(fJson)
    },

    /**
     * 预览表单
     */
    previewForm() {
      this.$refs.toolbarRef.previewForm()
    },

    /**
     * 导入表单JSON
     */
    importJson() {
      this.$refs.toolbarRef.importJson()
    },

    /**
     * 导出表单JSON
     */
    exportJson() {
      this.$refs.toolbarRef.exportJson()
    },

    /**
     * 导出Vue/HTML代码
     */
    exportCode() {
      this.$refs.toolbarRef.exportCode()
    },

    /**
     * 生成SFC代码
     */
    generateSFC() {
      this.$refs.toolbarRef.generateSFC()
    },

    /**
     * 获取所有字段组件
     * @returns {*[]}
     */
    getFieldWidgets() {
      return getAllFieldWidgets(this.designer.widgetList)
    },

    /**
     * 获取所有容器组件
     * @returns {*[]}
     */
    getContainerWidgets() {
      return getAllContainerWidgets(this.designer.widgetList)
    },

    //TODO: 增加更多方法！！

  }
}
</script>

<style lang="scss" scoped>
.el-container.main-container {
  ::v-deep aside { /* 防止aside样式被外部样式覆盖！！ */
    margin: 0;
    padding: 0;
    background: inherit;
    width: 345px !important;
  }
}

.el-container.full-height {
  height: 100%;
  overflow-y: hidden;
}

.el-container.center-layout-container {
  min-width: 680px;
  border-left: 2px dotted #EBEEF5;
  border-right: 2px dotted #EBEEF5;
}

.el-header.main-header {
  border-bottom: 2px dotted #EBEEF5;
  height: 48px !important;
  line-height: 48px !important;
  min-width: 800px;
}

div.main-title {
  font-size: 18px;
  color: #242424;
  display: flex;
  align-items: center;
  justify-items: center;

  img {
    cursor: pointer;
    width: 36px;
    height: 36px;
  }

  span.bold {
    font-size: 20px;
    font-weight: bold;
    margin: 0 6px 0 6px;
  }

  span.version-span {
    font-size: 14px;
    color: #101F1C;
    margin-left: 6px;
  }
}

.float-left {
  float: left;
}

.float-right {
  float: right;
}

.el-dropdown-link {
  margin-right: 12px;
  cursor: pointer;
}

div.external-link a {
  font-size: 13px;
  text-decoration: none;
  margin-right: 10px;
  color: #606266;
}

.el-header.toolbar-header {
  font-size: 14px;
  border-bottom: 1px dotted #CCCCCC;
  height: 42px !important;
  //line-height: 42px !important;
}

.el-aside.side-panel {
  width: 320px !important;
  overflow-y: hidden;
}

.el-main.form-widget-main {
  padding: 0;

  position: relative;
  overflow-x: hidden;
}

.container-scroll-bar {
  ::v-deep .el-scrollbar__wrap, ::v-deep .el-scrollbar__view {
    overflow-x: hidden;
  }
}
</style>
